Insulator-clamp.



W. G. CLARK. INSULATOR CLAMP.

APPLIOATION FILED SEPT. 2. 1905.

- J!- T. .3, g 1; 3 M 1 PATENTED APR. 23, 1907.

2 SHEETSSHEBT 1.

No. 851,222. PATENTED APR; 23, 1907. W. G. CLARK.

INSULATOR CLAMP.

APPLICATION FILED SEPT.2.1905.

2 SHEBTSSH BET 2.

Inventor I; MM

UNITED STATES PATENT oirnron.

WALTER G. CLARK, OF SEATTLE, WASHINGTON, ASSIGNOR TO THE- CLARK ELECT'ltlC'ANl) MANUFACTURING COMPANY, A OORPQRATION OF NEW YORK.

msu LATOR-CLAM P.

Specification of Letters Patent.

Patented April 23, 1907.

- Application filed September 2,1905. Serial 110.276.8236.

ton, have invented certain new and useful. Improvements in Insulator-Clamps, of which.

the following is a specification accompanied by drawings.

. Thisinven'tion relates to insulator'clamps and its objects are to improve upon said devices and increase their strength and efiiciency with reduction of cost.

Another-object of the invention is to en able a wire to be firmly clamped upon an insulator and at the same time afford provision for expansion and contraction of the wire without injuring the insulator or the clamp.-

- Further objects of the invention will hereinafter appear and to these ends theinvention consists of an insulator clamp for carrying out the above objects, embodying the features of construction, combinations of ele'- ments, and arrangement of parts,having the general mode of operation substantially as 2 5 hereinafter fully described and claimed in this specification and shown in the accompanying drawings, in which,-

Figure 1 is a top plan view of one form of the invention; Fig. 2 is a longitudinal sec- 3' tional elevation of the same with the parts in v I one'position; Fig. 3 is an elevation partly in n longitudinal section with the parts in another position; Fig. 4 is a perspective view of one member of one of the clamps; Fig. 5 is a top plan view of a modification of the invention; ig. 6 is a longitudinal sectional elevation of Fig. 5; Fig. 7 is an elevation partly in longitudinalsection with the parts in a different position from that shown in Fi 6; and Fig. 8 40. 1s a perspective view of one o the modified 'forms of insulator clamps. Fig. 9 is a vertical sectional detail view of a portion of the insulatorand a modified form of clamp. Fig. 10 is a longitudinal sectional view of Fig. 9. Referring to the drawings, A represents a suitable insulator provided with a cap 13, which may be in one or more portions, in this instance-t ie body and the cap being made all in one solid iece. The cap is provided with a groove D, or the wire E, and in accordance with this invention insulator clamps comprising co-operating members F and Gare adapted to be clamped to a wire or conductor and I suitably interlocked with the insulator cap in such manner that the wire is secured in pos1- 1 tion, but may expand and contract in accordance with changes of temperature without breakingthe insulator andwithout injuring the clamps. The wire or conductor is so held that it cannot move longitudinally nor can it riseout, of the groove in the cap.

the form of the invention shown in Figs.

'l to' 4 inclusive, the'cap of the insulator is provided with hollowed circular socketsH at each end of the groove D in the sides of the cap and the clamps are provided with hemiforming ball and socket insulator and the clamps.

The clamps comprise co-operatingmembers F and G provided in addition to the balls -I, with longitudinal grooves J for the wire, and pins or projections K extending from the body portion L. The body portions L are also provided with apertures 0 so that when the two members F and G are placed opposite each member, the projections K enter the apertures O. The members F and G are secured together by suitable means as the nuts P adapted to be screwed upon the screw-threaded ends of the projections K. The clamping members F and G are also preferably' provided with suitable eyes or loops S to which are connected the bands T lying in the grooves Von the outside of the cap B, whereby the clamps are prevented from tipping sideways under strains. The bands T,- and clamps at each end form two halves of the complete clamp which co-operate to hold the wire or conductor in place. With this construction the clamps may be used either with or without the retaining bands.

The sockets H are of a slightly greater dl'. ameter than that of the hemispherical portions I on the clamps, so that the balls formed by the portions I have a certain amount of play in the sockets to permit the wire or c0nductor E to sag as'indicated in Fig. 3. According to this construction it will be seen that the Weight of-the wire is thrown upon the insulator and not upon the clamps themselves which is a great advantage.

joints between the shown in which the sides of the cap B are provided with angular grooves. H ateach end of spherical bearing portions I which are adapted to co-operate with the sockets 11, thus In Figs. 5 to 8 inclusive, a modification is the slot D and the members F and G of the clamps are provided with wedge shaped portions 1, co-operating with the angular roove H. The angle of the groove H is s ightly greater than the angle of the wedge I so that the insulator clamps may have a certain amount of play to enable the wire to sag as indicated in Fig. 7 without throwing the strain and weight of the wire upon'the clamps. The clamps F and G are also provided with eyesS for the bands T sothat if desired, said bands T maybe used in connection with the I clamps.

. forms,therefore, withoutlimiting the invenattachment of holding bands to surround at tion to the devices shown and described, and without enumerating equivalents,

I claim and desire to'obtain byLetters Patent the following; II

1. The combination with an insulator and conducting wire, of detachable clamps for said wire adapted to hold the wire in position, said clamps com rising co-operating grooved. members provi ed with bearing portions adapted to co-operate with sockets on the outside of the insulator.

2. The combination with an insulator, of

detachable insulator clamps each comprising a plurality of grooved members adapted to be clamped to the wire and having bearing POT-r tions movably supported in sockets on the outside of the insulator.

3. The combination with an insulator, of insulator clamps each comprising a plurality of grooved members adapted to be clamped to the wire conductor and having bearing portions movably supported in sockets on the least a portion of the insulator, whereby the clamps may be connected together.

outside of the insulator and arranged for the 4. The combination with a grooved insulator and conductor, of detachable means movably secured to the insulator for clamping the conductor, said means consisting of two co-operating clamping members encircling the. insulator, and means for securing said members to ductor. I

5. The combination with a grooved insulator and conductor, of detachable means movably secured to the insulator for clamping the conduct-or, s'aidmeans consisting of each other and to the conbands' at each side of the insulator provided,

clamps secured to said Wire and adapted to engage said sockets.

I 7. The combination with a conducting wire and an insulator provided with a groove, sockets at each end of said groove, clamps secured to said wire and adapted to engage said sockets, and bands secured to said clamps, whereb the clamps are prevented from tipping si eways under strams.

8.' The combination with a conducting wire and an insulator provided with a transverse groove, hollowed sockets at each end of said groove, and clamps secured to said wire and adapted to engage said hollowed sockets.

' 9. The combination with a conducting wire and an insulator rovided with atransverse groove, hollowed sockets at each end of said groove, clamps secured to said wire and adapted to engage said-hollowed sockets, and clamps provided with bearing portions secured to said wire and adapted to co-operate with said sockets for securing thewire to the insulator. I p

In testimony whereof I have signed this specification in the presence of' two subscribing witnesses. v

' WALTER G. CLARK.

Witnesses:

I G. W. KYBURG,

' H. A. W1LsoN.'. 

